<template>
  <div class="my-tab-bar">
    <div
      class="tab-item"
      v-for="(item, index) in list"
      :key="index"
      :class="{ current: index === activeIndex }"
      @click="clickFn(index, item.componentName)"
    >
      <!-- 图标 -->
      <span class="iconfont" :class="item.iconText"></span>
      <!-- 文字 -->
      <span>{{ item.text }}</span>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 判断高亮
      activeIndex: 0,
    };
  },
  props: {
    //list要满足的要求
    list: {
      type: Array,//类型：数组
      required: true,//必须
      validator(val) {//长度在2-5之间
        if (val.length < 2 || val.length > 5) {
          console.error("list必须在2-5之间");
          // 不满足返回false
          return false;
        }
        // 满足返回true
        return true;//
      },
    },
  },
  methods: {
    clickFn(ind, componentName) {
      // 点击切换高亮
      this.activeIndex = ind;//
      this.$emit("changeActive", componentName);//子传父
    },
  },
};
</script>

<style lang="less" scoped>
.my-tab-bar {
  position: fixed;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 50px;
  border-top: 1px solid #ccc;
  display: flex;
  justify-content: space-around;
  align-items: center;
  background-color: white;
  .tab-item {
    display: flex;
    flex-direction: column;
    align-items: center;
  }
}

.current {
  // color: #1d7bff;
  color: pink;
}
</style>
